REFLECTOR: Reflector Digest, Vol 108, Issue 5

Tue Mar 4 13:37:11 CST 2014

Nick,

Got any pictures of your duct and alternate air door?

-Don

On Tue, Mar 4, 2014 at 12:07 PM, Jones Nick <nick.jones at volvo.com> wrote:

>  I installed a NACA scoop from a Lancair IV in the bottom cowl with a K&N
> air filter from a Dodge Viper with plumbing going up to the intake on the
> engine. I have a Cirrus SR22 alternate air door at the intake if things go
> wrong. I can't speak to how successful it is because I have not flown it
> yet, but it is installed in a high pressure area and it works good on the
> Lancair.
>
> Nick and Connie Jones
> Velocity XL-RG
> N10CN
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of reflector-request at tvbf.org
> Sent: Monday, March 03, 2014 19:58
> To: reflector at tvbf.org
> Subject: Reflector Digest, Vol 108, Issue 5
>
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> Today's Topics:
>
>    1. Re:  Air intake (Don Johnston)
>    2. Re:  Air intake (Brett Ferrell)
>    3. Re:  Air intake (Mike Dawson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 3 Mar 2014 12:36:07 -0600
> From: Don Johnston <numa at comcast.net>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Air intake
> Message-ID:
>         <CALD29ipyRcCd7LpQfi6L_Q3mXTw-DT=
> X9vQd646zL+152tTY_Q at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I can't speak to the benefits of a scoop, but Malcolm told me once not to
> center it under the cowling. He said that debris from the nose wheel will
> get flung up into it.
>
>
> On Mon, Mar 3, 2014 at 11:11 AM, Jack Prock <jackprock at wavecable.com>
> wrote:
>
> > Hi,
> >
> >
> >
> > I would like to know if anyone has any thoughts on air intakes. I am
> > getting down to the last
> >
> > few items on my list before flight and one thing I was thinking about was
> > to put in an air intake
> >
> > scoop under the engine cowling. Something along these lines:
> >
> >
> >
> > [image: NHRA Pro Stock Composite Hood Scoop 100-8506]
> >
> >
> >
> > Now my question, is for the people that have put an external air intake
> on
> > the plane.
> >
> > Do you get a boost at higher altitude because of the ram air effect? Does
> > the drag of
> >
> > the scoop outweigh any positive effect from the boost?
> >
> >
> >
> > I have already started designing the scoop, but now have second thoughts
> > and wanted
> >
> > to see if I was going down the wrong path.
> >
> >
> >
> > Any thoughts?
> >
> >
> >
> > Jack Prock
> >
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> ------------------------------
>
> Message: 2
> Date: Mon, 03 Mar 2014 14:25:13 -0500
> From: Brett Ferrell <reflector at velocityxl.com>
> To: reflector at tvbf.org
> Subject: Re: REFLECTOR: Air intake
> Message-ID:
>         <1393874713.11315.90070521.7186B86E at webmail.messagingengine.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Thanks for the shout-out... we do have a narrow deck Lycoming, but it
> dynoed at just over 300 HP, with high compression pistons...
>
>
>
> --
> Brett Ferrell
> reflector at velocityxl.com
>
>
>
>
>
> On Mon, Mar 3, 2014, at 12:49 PM, Mike Dawson wrote:
>
> N44FV, a XLFG with a 260hp Lycoming, has been said to do about 180.
> This by Scott Swing who flew it as seen in a you tube video. Whether
> this was MPH or KTS really doesn't matter, Here is why.  I own a XLFG
> with a 350hp Chevy V8. Other than downhill I have only seen 174KTS flat
> out!
> Now granted it is still in rough primer but I don't believe paint will
> make up for the airscoop I have hanging below the belly for the
> radiator.
>
> Our sleek airframes don't like stuff hanging off of them.
>
> N427VA a SERG 427 V8 useing NACA scoops to cool however, hauls ass.
> Bill and Brett did it right IMHO!
>
> Mike
> N104DD
>
>   *
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> ------------------------------
>
> Message: 3
> Date: Mon, 3 Mar 2014 16:57:30 -0800
> From: Mike Dawson <medawson250 at yahoo.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Air intake
> Message-ID: <0A6EE711-E0D6-46E4-B9B4-73F14DD0FB3E at yahoo.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Well that makes me feel a little better.
> I do have to say mine climbs well but that is usually what excess
> horsepower does anyway.
> My apologies.
>
>
>
> Michael E Dawson
> ATCI CFII
>
>
> > On Mar 3, 2014, at 11:25 AM, Brett Ferrell <reflector at velocityxl.com>
> wrote:
> >
> > Thanks for the shout-out... we do have a narrow deck Lycoming, but it
> dynoed at just over 300 HP, with high compression pistons...
> >
> > --
> > Brett Ferrell
> > reflector at velocityxl.com
> >
> >
> >> On Mon, Mar 3, 2014, at 12:49 PM, Mike Dawson wrote:
> >> N44FV, a XLFG with a 260hp Lycoming, has been said to do about 180.
> This by Scott Swing who flew it as seen in a you tube video. Whether this
> was MPH or KTS really doesn't matter, Here is why.  I own a XLFG with a
> 350hp Chevy V8. Other than downhill I have only seen 174KTS flat out!
> >> Now granted it is still in rough primer but I don't believe paint will
> make up for the airscoop I have hanging below the belly for the radiator.
> >>
> >> Our sleek airframes don't like stuff hanging off of them.
> >>
> >> N427VA a SERG 427 V8 useing NACA scoops to cool however, hauls ass.
> Bill and Brett did it right IMHO!
> >>
> >> Mike
> >> N104DD
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> End of Reflector Digest, Vol 108, Issue 5
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